:root {
  --bg: #f8f7fc;
  --card: #ffffff;
  --ink: #2e1a6b;
  --ink-secondary: #6f66a8;
  --ink-tertiary: #9a93c4;
  --accent: #1db6a6;
  --accent-bright: #34d9be;
  --accent-mint: #7df9e4;
  --signal-blue: #5b8cff;
  --border: #e4e3e1;
  --accent-soft: color-mix(in srgb, var(--accent) 16%, transparent);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0820;
    --card: #1a1140;
    --ink: #ece9fb;
    --ink-secondary: #b8b0e0;
    --ink-tertiary: #8983b0;
    --accent: #34d9be;
    --accent-bright: #5eebd3;
    --accent-mint: #7df9e4;
    --signal-blue: #7ea2ff;
    --border: #322a5c;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, "Avenir Next", "Segoe UI", "Inter", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 10%, color-mix(in srgb, var(--accent-mint) 20%, transparent) 0%, transparent 35%),
    radial-gradient(circle at 90% 15%, color-mix(in srgb, var(--signal-blue) 16%, transparent) 0%, transparent 35%),
    var(--bg);
  line-height: 1.65;
}

.container {
  width: min(960px, 92vw);
  margin: 2rem auto 4rem;
}

header {
  /* Fixed (non-theme-flipping) dark gradient — deliberately not var(--ink)/var(--accent),
     which invert in dark mode and would leave white header text on a light background. */
  background: linear-gradient(135deg, #2e1a6b, #1db6a6);
  color: #ffffff;
  border-radius: 16px;
  padding: 1.75rem;
  box-shadow: 0 16px 40px rgba(46, 26, 107, 0.22);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.6rem;
}

.header-logo {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  display: block;
}

.header-brand span {
  font-weight: 700;
  letter-spacing: 0.02em;
}

header h1 {
  margin: 0;
  font-size: clamp(1.5rem, 2vw, 2.2rem);
  letter-spacing: -0.015em;
  text-wrap: balance;
}

header p {
  margin: 0.5rem 0 0;
  color: var(--accent-mint);
}

main {
  margin-top: 1rem;
}

.top-nav {
  margin-top: 0.85rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.55rem 0.8rem;
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.top-nav a {
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.15s ease;
}

.top-nav a:hover {
  opacity: 0.7;
}

section,
article {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.35rem;
  margin-top: 1rem;
  box-shadow: 0 1px 2px rgba(46, 26, 107, 0.04), 0 8px 24px -8px rgba(46, 26, 107, 0.1);
}

h2,
h3 {
  line-height: 1.25;
}

h2 {
  margin-top: 0.2rem;
  color: var(--ink);
}

h3 {
  margin-bottom: 0.4rem;
  color: var(--ink);
}

p,
li {
  color: var(--ink);
}

.small {
  color: var(--ink-secondary);
  font-size: 0.95rem;
}

a {
  color: var(--signal-blue);
}

a:hover {
  text-decoration-thickness: 2px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.9rem;
}

.card-link {
  display: block;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.95rem;
  text-decoration: none;
  color: inherit;
  background: color-mix(in srgb, var(--accent) 6%, var(--card));
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.card-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px -10px rgba(46, 26, 107, 0.2);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
}

.card-link strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--ink);
}

.badge {
  display: inline-block;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #ffffff;
  font-size: 0.8rem;
  padding: 0.2rem 0.55rem;
  font-weight: 700;
}

.notice {
  border-left: 4px solid var(--accent);
  padding-left: 0.8rem;
  color: var(--ink);
}

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0 -0.1rem;
}

table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.6rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: color-mix(in srgb, var(--accent) 8%, var(--card));
  color: var(--ink);
}

footer {
  margin-top: 1rem;
  color: var(--ink-secondary);
  font-size: 0.9rem;
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}